EE: Prevent remote mirrors from failing when project is in pending_delete (!938)

Upgrade barometer

These versions do include a single migration, and will require brief downtime of typically less than one minute.

Please be aware that by default the Omnibus packages will stop, run migrations, and start again, no matter how “big” or “small” the upgrade is. This behavior can be changed by adding a /etc/gitlab/skip-auto-migrations file.